Pour 1/2 clarified butter into frying pan on medium heat. Add veal and pork and season with salt and pepper. Let simmer. Cook on both sides.

In another pan, cook beef in remaining clarified butter over high heat and season with salt and pepper, turning once. Add brandy, flame pan, and add all to pan with veal and pork. To the pan that the beef was cooked in, add mushrooms and stir in 1-ounce fresh butter. Season with salt and pepper. Cook on medium heat, then add noodles on top of mushrooms and gently mix the 2 together. Stir in remaining butter.

Transfer meat with slotted spoon to 1 side of serving platter. Pour liquid in pan into noodles and mushrooms. Mix in sour cream and reheat. Serve alongside meat. Dust with parsley and serve.